Display screen or portion thereof with transitional graphical user interface



A portion of the disclosure of this patent document contains material which a claim for copyright is made. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the US Patent and Trademark Office patent file or records, but reserves all other copyrights whatsoever.

FIG. 1 is a front view of a display screen or portion thereof with transitional graphical user interface showing the first image in a sequence.

FIG. 2 is a front view of the second image thereof; and,

FIG. 3 is a front view of the third image thereof.

The appearance of the graphical user interface of the display screen or portion thereof sequentially transitions between the images shown in FIGS. 1-3. The process or period in which the graphical user interface transitions forms no part of the claimed design.

The outer broken line shows a display screen or portion thereof while the remaining broken lines represent features of the graphical user interface excluded from the claim. The three dots in the upper right corner of the graphical user interface are claimed subject matter. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical transitional user interface, substantially as shown and described. 